boerner



(No Mode1 I G. BOERNERV.

MACHINE FOR MAKING NUT'BLANKS. No. 395,032. Patented Dec. 25, 1 888 "i WT UNITED STATES PATENT OEEIcE.

EMlL BOERNER, OF PORT CHESTER, NEV YORK, ASSTGNOR TO \VILLTAlll E. \VARD, OF SAME PLACE.

MACHINE FOR MAKING NUT-BLANKS.

SPECIFICATION forming part of Letters Patent No. 395,032, dated December 25, 1888.

' Application filed May 18, 1888- Serial No,274,339. (N model.)

To (tZZ whom it may concern.-

lie it known that I, EnrL (J. BOERNER, of Port Chester, in the county of \Vestchester and State of New York, have invented a new and useful Improvement in ll'lachines for Making Nut-Blanks; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming apart of the same, to be a full, clear, and exact dero scription thereof.

The machine hereinafter described is intended and particularly adapted for the carrying out or practice of an improved method of making nut-blanks set forth in an application for Letters Patent heretofore filed by me, which method consists, broadly, in employing a plunger or punch of larger area in crosssection or upon its face than the area of the opening in the female die, which is to give the desired or final form to the blank. I

The present invention consists in certain features of construction and arrangement of mechanism hereinafter described and claimed.

Referring to the accompanying drawings, Figure 1 represents a central vertical section through the machine, the punch being in rearward position. Fig. 2 shows a section of a portion of the machine, representing the 0 punch or plunger at the extreme of its forward moven'ient, having forced a blank partially into the hexagonal shaping-die. Fig. 3 represents a similar view showing the punch in the act of moving forward and causing a blank to force the next preceding blank wholly into the hexagonal die and thereby fully shape the said preceding blank, and also move forward into the delivery-duct the series of preceding blanks. Fig. '1 shows a perspective view, on an enlarged scale, of the cutting-off die. Fi represents in perspective the hexagonal female die. Fig. 0 shows in perspective a portion of the plunger or male die. Fig. 7 represents in perspective a primary blank as cut from a bar of stock.

Fig. 8 shows in perspective a nut-blank having the desired tinal form.

A, 1, represents the main shaft of the machine.

B is an eccentric mounted on the same,

which, through its strap 0, gives a reciprocatory movement to the cross-head. 1), moving in suitable slides. To the front en d of this crosshead there is attached the usual head-block, E, which carries the punch F. This punch is shown as square in cross-section, although it may be circular or of other shape upon its end, and, in co-opcration with a fellow die, G, having an opening of corresponding form,will cause a primary blank to be punched from a bar of stock, S, corres'pomling in form with that shown at Fig. 7.

It is to be understood that the bar of stock has been previously punched with the central hole, 3, for the nut, and that such bar is intermittingly fed along between the punch F and the die G by any well-known form of feeding mechanism, so as to allow successive rectangular pieces of metal composing the primary blanks herein mentioned to be punched therefrom in a perfectly well-understood way.

The punch shown is provided with a teat which is capable of entering easily the hole already punched in the bar, and thereby supplementary to the feeding mechanism perform the duty of readjusting longitudinally, if necessary, the position of the bar to secure a proper alignment of the punched hole with the axis of the female die. This matter, however, does not concern the present subject of invention, but is the subject of another application for Letters Patent. The area of the end or cross-section of the punch F, and consequently the area of the primary blank a, Fig. 7, is greater than the area of the hexagonal blank intended to be made, asillust-rated at b, Fig. 8.

H indicates a female die having a hexagonal opening which is located in the rear of the die G, the axes of the two dies coinciding. The area of the opening in the die H is less than the areas of the opening in the die G and the end of the punch F, respectively. The plunger F forces the primary blank (,4 against the face of the hexagonal female die H and crowds the blank into the same to any desired extentsay,for one-half of the thickness,more or lessas shown at Fig. 9, the throw of the eccentric B being sufficient to give the neces- IOO sary movement to ihe punch. practicable witheui' great lialjiilitw" of injury ll would he iinto the face of ihe punch 11 in crowd ihe pri mary blank completely into ihe die H, and it readilyululersl'ood.

is therelfore n1 uch hei'i'er in pi'acij iwlo have i he hlank protrude heyond the face of The die 1 I, when lirsi introduced Therein hy the punch l, by adistance which will prevent The possibility off the face ol the punch, which is incapable of entering the opening in the hexagonal die ll, eoming info contact with its face. The puneh or plllllg'Cl F is now withdrawn as the result of ihe revoluiion oi the main shalh 1\,ihe bar of stock is led along anotherspace by i-he Eel-ding mechanism helore rel'erred to, and the operation of punehing oui from the 1m a secondary primary hlank n and erowding it pariially inio (he die ll is repealed.

5 and through which the punch can pass, a sec- This second operation neeessarily forces the 3 previous primar hlank, which was lel'i' partially in the die ll, wholly into The said die. Successive Forward movements oi the punch or plunger P will cause new hlanks to he formed and ihe blanks one alier anoiher io be discharged inlo the delivery-duel hi oi the maehine, as indieai'cwfl at liig'. 3.

Although I have shown and deswihed the blanks as punched from a har ol' s1 oelc. which is fed through the machine, Yet in place of ing; ceniral holes and a larger area than, the opening in the (lie G may be fed, one by one, from a stack in a wellsknown n'ianner helween the plunger 1: and die (l, as will he end female die lo :ated directly in the rear of the [irs'r die and having its axis eoineidil'ig thermrith, the opening: in which second die is of a lwxagonal or other form corresponding with the form elf the blank to he made, and the area oi said opening ljieing less than the area 01" The face of the said punch, for the pur iose SpPClilLil.

feeding a ha r of siock pieces of metal hav- ICM'I'L l. ,HOERNER.

\\'ii11esses: i

EnseN museum .loNns, SAM [:EL Cm] LY. 

